Along time ago, in the upper world, there are many races, namely Angels, Demons, Elves, Centaurs, and Gods.
In the past, Demon was a kind and friendly creature, because of his praiseworthy nature, the Angels were jealous of him. because of that, Angel wanted to do something cruel to the Demon, he (the Angel) slandered the Demon, that the Demon was a liar creature.
The information spread quickly, and finally the information reached Gods, then, the God believed that information, A God who is the king of the upper world, he expelled Demons from the upper world.
With great disappointment and great anger, The Demon is determined to destroy the upper world.
Many years later, the Demon has prepared his army, and is ready to attack the upper world.
Knowing that the Demons want to attack him, the upper world would not remain silent, they prepared their army quickly.
After that, there was a big war between upper world and Demons, many victims fell as a result of this war, including innocent people.
Centuries later, the war finally over, The Demon declared his defeat because they were outnumbered, and the war was won by the upper world.
After its defeat, the Demon race was considered lowly creatures by the other races. And the Demon race was forced to stay on earth.